ISDN S0 fiber optic multiplexer in a desktop case for connecting of two S0 NTBA or PABX ports with 2x RJ-45 ISDN S0 BRI ports and 1x SFP slot. ISDN port assignment: ETSI, coding AMI. Dimensions LxWxH 206x163x43mm, operating temperature 5°C..40°C, relative humidity 10%..90% non condensing, input voltage 230V AC (EU wall wart included in delivery), optional with 24V DC or 48V DC available. Firmware Update via USB port possible. Opposite side see item 10420021S or 104202PS.